Carburetor



S. S. ALLWILL 'CARBURETOR Filed Sept. 8. 1926 A ril 5, 1927. 17623399 J; wnfvn -fe mour Patented April 1927.

UNlTED fil h'llilfi FATENT @FFlfiE.

STEPEZEN SEYMQUE ALL'WILL, Q AUCRTLAA D, NEW ZEALAN'D.

oer monsoon.

Application filed September 8, 129%, Serial No. 13%,244, and in How Zealsnfl. August 7, 19 26.

This invention relates to carburetors for upward into the mixing chamber. Thevelve internal combustion engines and more per- 3' must be considered as ecfioet controlled ticulerly the engines used in connection With check valve since ii: merely acts to prevent m tor v hi l flooding when the fuel supply tank is lo- 5 its object is to provide for especial i'eecl catecl above the chamber A. The chamber A control in which the use of a vacuum tank is not open to the atmosphere and the valve is eliminated, and also to provide for the G acts to close the supply of fuel when supply of fuel tothe mixing chamber being the desirecl level is reecheci. As soon as cut oil should u back fire occur in the e:-;- the fuel level in chamber A drops, the valve 3 plosion of the charge, through any cause. C opens, since epartial vacuum is created The invention consists in e cerhuretor which will result in fuel running into the made up of two main parts, as in ordinary chamber from the fuel tank, due to the carburetors, viz, e fuel holcling chembeiyencl pressure of the atmosphere on the fuel in the e mixing chsinber into which. the fuel is fuel tenlr. l5 sprayed and mixed with the air to pass into There is, of course, air in the top of the the engine intake, end'which fuel chamber chamber A which is entrapped therein at is kept supplied with fuel by clirect suction approximately atmospheric pressure, which from the engine, and which mixing chamber will ensure a flow of fuel through the openis so constructed and. fitted that the nozzles ings E encl F when the, suction effect of 29 and the engine intake, are automatically the pistoncreates a nertiel vacuum in the closeol on e heel; lire taking piece and mixing chamber. To replenish the fuel in through he back pressure of gases caused the loot chamber ihe parts of the check by such beck fire valve, that is the valve and the float, are so The invention is illustrated in the 2.0- proportioned that the buoyancy oi the float 25 compsnying drawings anal Will be hereinwill be just great enough to overcome the after fully described in relation to such pressure. of the head. oi fuel on the valve drawings, I to close the valve when the chamber A Figure l is a, side elevation of the coinis filled to e level with the opening in the plate carburetor, inlet member of the mixing chamber 3 Figure 2 is a sectional elevation of the The fuel is adapted to be drawn from the fuel choinber thereof. chamber A. by the engine suction en i then Figure 3 is a sectional elevation of the through the partial vacuum created; in the mixing chamber, the section being taken on chamber to in e the supply in such chamber ihe line 3-3 of Figure l. replenished iron: the lllilill fuel tank, into 35 Figure L is a sectional plan thercot on the which onls allowed to euier to provirie the line 4% of Figure 1. pressure necessary to reuse the fuel to flow In carrying out the invention the fuel to the carburetor. This systemof feedthere- 8 chamber A and the mixing chamber B may i'oi'e dispenses with ihe vacuum tank usuellv for convenience be assembled together as in employed with vacuum feed systems null ordinary carburetor construction and as inches the fuel chamber of the carburetor seinbly. The said chamber A is connected not as its own vzicuum tank.

with the fuel supply through a pipe C eutcr- The mixing" chmubcr in this invention is ing at the top and the mouth of which is made of vertical cylindrical form, into the fitted with any approved form of fioet conhottoni of which the fuel is led from the 45 trolled valve C which acts to prevent any pipe D into on upwardly projecting thimoverflowing of the chamber. The connection blc like fitting or fuel inlet chamber E havl) to the mixing chamber B extends from ing in the top end thereof :1 series-0f holes the bottom of the fuel chamber and passes E, through which the fuelis designed-i0 v 1' "this thin'flfle a cap I is so that It number and EW holes 15, so

7 rea i crawl: 1 or so H121? tha. they may register t x J the sap may be'turned to close (If! ihe holes sumka of ma men F01- tuming the my 331, a spmsgi f aimed ta zts 150p and. ex Y 42 g; ghmd F) m aha mp 01 This spzazdle may E32 con- Wei known W2 2 -d5 mm 011 ide 02. 'lure cutie b from air passes mmd iis gassage t0 fihe ha i110? mvided. 53m fit he chambey cylinder, and 32131961 with gports J--J awe disposed to register with e; awnings 0f the pipes, 3: 22nd slam-1e ho'zvever is free 0 mmte 9f be broughtyio I 'pe openings &0 a cap is a ramaily amendaa'; the normal pcsi'tiofi of fine jets am may 1 c9 mfivweeix 51a map and. t3, si-iie 0i? 51kg spelling 1.1; i At its @1122; edga 1' J e-eve 5 to provide f0? Eh; my Earning u ethez w en is tame .fi such connect-ism so x5 its mammal s0s1tw: 331 A 2 a "u wnnec'm 21s 2.11

and Line :21 w

J mixtm'e. 511011 1 :1 e in Live, @ngine intake, mreuf wili then act on 11-; pi'ui'a-raifly :mw'ed m;

it in mm; m carry 'wifl; it Gem J and thereby in time mad, 121m) m close he pa 3 po Fihiliiy of 11m ind sup P11: it; uvwzai'wl.

ugh the IHQLRHS provided mrgmse,

if desiieah clean-i he uixpg eienmm Ll mm 022 1'- )Q-smi within the he? g'raambez: A 50 ihe purpuw 0i? hegxt' the .19, to N'ULQX' is readily 'VOlZi'LuZfibiE when 111g chamber assor mzwsm 2. A carburetor mmpris my dosed to the mmas pipe associated Wiih controlled check vaiva adapted 0 check r the suppiy pipe when the fuel reaches" a. predetermined level is. 119 ahambev; a tea; with. tbs fuel charm-- bar for mixing the fuel and. air and. mm

. veiling the flow ihereaofi 3. A carburetor for inieanai c smbusizion engines cnmprisiz'xg a chamber haw ing an air inlet and am onilet for the fine mixture; 11w inlcfi; member in. the chamber having an opening; the; i251 for passaga of th fuel; a cap 011 $1115. in iet mamber am;

having an mpening: therein adapted ister with the opening in fin: i 25; u .s ieeve in said shzml'ber having 52 an suilut coapemcizlg Wiih Em air 5H; .4 file fun? fixture (mgiei; iihe shamber; anti 6 means comma ed i0 ihe. cap and iha ale and adapted to acinam said. C2113 and 53 98 55 in place 5311c openizv s 111 nhe cup am. in a: member and M 1: in and outlet-s m mixing chamber and sieeve out 0% regiswr wiwn back fin: takes piacg the engine.

A curburceior for internal combusdmz engines comprising a mixing chamber having an air inletv and an outlet for the fuai mixture; ui'uul inlui member in due thumbs? having an o pvning herein fer the passaga of the fuel; a cap on saidi inlet member and having an opening thez' in adapted i0 reg? ter with ihe opr-ning in the inlet member; a] ,QIQQYQ in mid uhan'xber Inning inlet and unmlfle't woperating with Um 3i? inlet the fuel lnixtura outlet nil the chmnber; and a vane connected to the cap and the and :ulapied to actuate said cap and s1. 10 place My: awnings 1'11 Hm (7:11 am nmnber and the inlets :L fl mrtkts i mixing ahamlver and sleeve out of re when hack fire takes place in the enggi A carburetor 01 internal combusiimm engines comprising mi Eng cliamber haw ing an ink-(151ml an outlet part and an ixflet opening or the fuel; 2.1 cap in the chamber and associated with said fuel inlet opsning 

